Gas-engine valve.



PATENTED'SEPT. 25,' 1906. J. L. BROMLBY. GAS ENGINE VALVE.

2 SHEETS-SHEET 1.

APPLICATION IILBD 22.5. 1905.

dttoucm;

I PATENTED' SEPT. 25

J. L. BROMLEY. GAS ENGINE VALVE.

APPLICATION IILED APB..5. 1906.

2 SHEETS-SHEET 2.

SYLVANIA.

GAS-ENGlNE JALh Specification of Letters Patent.

Patented Sept. 25, 1906.

implication tiled April 5, 1905. Serial No. 253,938.

Be it known that I, Jonn L. Bnonnnv, a citizen of the United States, residing at Oil titv, in the county oi Venango and State 01' .lennsylvania, have invented new and useful linprovenu-nts in Gas Engine Valves, of which the following is a specili 'ation.

This invention relates to valves oi the pup pet type designed especially for use in coninsuring positive and accurate seating oi' the lat 1 er, and one wherein return oi the expelled gases to the combusthiii-chamber is wholly obviated, thereby insuring a fresh charge be ing received for each explosion.

A further object of the invention is to provide a device. of this character having in its organization a pair of reversely movable valves and a main seating-spring common to and tending to seat both valves, one wherein each valve will be guided in its movements by the stem of the other and one wherein an auxiliary spring assists in opening the inlet and lirmly seating the exhaust-valve.

With these and other objects in view the invention comprises the novel features oi construction and combination oi parts more fully hereinai'ter described.

in the accompanying drawings, Figure 1 is a. sectional view of parts of an ex plosive-engine equipped with a valve embodying the invention. Fig. 2 is a sectional elevation of the valve shown on an enlarged scale.

Referring to the drawings, 1 designates a valve-casing having an inlet-port 2 and an exhaust-port 3, said ports being adapted for communication with a passage or duct 4, leading to the engine-cylinder 1. Arranged for normally closing communication between the port 2 and passage 4 is an inlet-valve 5, having a tubular stem 6, closed at its outer end and slidably disposed withinthe casing 1, which latter is provided with a seat 7 upon which the valve normally rests. For nor mally closing connnunication between the exhaust-p0rt 3 and passage 4 is a valve 8,

slidably\disposed in the aising and designed to normally rest upon a seat 9, provided in the latter, said valve being carried by a stem 11), extending upon oppositesides of the valve and having a bearing at the outer side of the latter in the casing 1 and at the inner side of the 'alve in the tubular stem 6, with which the stem 10 is slidably and telescopically engaged, as shown herein. Formed upon the inner end of the stem 10 is a reduced. portion or seat 11, which receives one end of a primary seat.ingspring 12, housed within the tubular stem 6 and having hearing at its other end upon the closed end oi the latter, there being formed in the casing 1 a recess 13, in which is disposed an auxiliary spring 14, hearing at one end upon the valve 5 and at its other end on the end wall of the recess. The stem 10, which extends rcarwardly, is slidably mounted in a bearing 15 on the cylinder and provided at its rear end with a roller 16, adapted to contact with an eccentric head 17, journaled upon asuitable stuhshaft 18 and connected by a gear 19 and pinion for peration from the engine-shaft 21, it being understood that during the operation of the device the head 17 will be driven from the shalt 21 and act upon the stem 10 for opening the valve 8 at suitable intervals.

in practice the normally expanded spring 12,. owing to its arrangement between the valve-stems, acts reversely upon the latter, thereby tending to maintain both of the valves in seated position, as will be readily understood, while the spring 14 has a tendency to unseat the valve 5 and at the same time to force the valve 8 morefirmly upon its seat 9. It will be understood that in action when a charge is drawn through the port 2 under the action of the. engine piston Within its cylinder the valve 5 will through suction aided by the spring 14 be moved bodily from its seat in the usual IIizJHlGI, thus permitting the charge to enter the cylinder through the medium of the passage- 4. The s ring 14 during this action seryes as an auxi iary aid to the main seating-spring 12 for forcing the valve is more firmly upon its seat, and thus obviating liability oi the latter valve opening while the charge is being taken into the cylinder. After each ex losion the stem 10 is act ed upon mechanica ly in manner above decharge into the explosion through the ort 3, it being apparent that while the va spring 12 will be compressed and maintain the valve 5 firmly upon its seat.

From the foregoing it is apparent that I produce a simple-inexpensive device adapted or the attainment of'the ends in view, one wherein the valves will move smoothly and evenly and be actuated in their movements one by the other, one in which accurate seating of the valve is insured and pounding of the valve 8 upon its seat with consequent wear of the arts obviated, and one wherein opening of t e valve-8 and return of the expelled gases during the taking of a fresh the cylinder is positively prevented. In attaining these ends it is to. be understood that minor changes in the-details herein set forth may be resorted to without departing from the spirit or scope of the invention.

Havin 1. In a device of the class described, a casing provided with valve-seats, a pair of reversely-movable valves designed to rest respectively on said seats=a pri mary spring common to and acting upon ve 8 is open the thus fully described the invention," -move the what is e aimed as new is both val'ves to maintain the latter in seated position, and an auxiliary spring acting upon and tending to ranged in te escopic sliding engagement, :1

primary spring common to and acting upon both valves to maintain thelatter in seated position, and an auxiliary spring acting upon and tending to unseat one of the valves.

3. In a device of the class ing provided with a pair of valve-seats and having a recess in rearoi one of said seats, a pair of reversely-movable valves designed to rest respectively on said seats, a primary sprin'g common to and acting on both valves for maintaining them in seated position, and a second spring disposed in said recess and tending to unseat the adjacent valve and other valve to seated position.

- In testimony whereof I afiix my signature in presence of two witnesses.

. JOHN L. BROMLEY. Witnesses:

W. K. DICKEY. .T. M. McGiLL.

described, a cas- 

